Patch tracker / CVE reference / CVE-2025-2884

CVE-2025-2884

CVE-2025-2884 is a medium severity Microsoft vulnerability with a CVSS score of 5.3. Its EPSS score puts the probability of exploitation in the next 30 days at 26%. Microsoft has shipped the fix: deploy one of the 4 updates below from the Microsoft Update Catalog, and see where this CVE sits against the rest on the patch tracker.

Risk summary

Medium

5.3

CVSS v3

26%

EPSS, 30 days

Medium

Severity

Not in the CISA KEV catalog. EPSS exploit probability 26%. CVSS 5.3 (Medium).

This CVE is among the lower half of tracked Microsoft CVEs by EPSS exploit probability.

Senserva AI Opinion for CVE-2025-2884

A Critical, CVSS 9.9 out-of-bounds read in the TCG TPM2.0 reference implementation leaks information and reaches across Windows 11 Version 25H2, 26H1, and 22H2 for x64 systems. Because the flaw sits in the TPM reference code rather than a single Windows feature, it touches any device relying on that TPM stack for secure boot and key storage. EPSS sits at 26 percent, high enough that this should not wait for a routine cycle.

Do this: Prioritize the TPM2.0 fix across all Windows 11 25H2, 26H1, and 22H2 fleets this week.

AI-generated from public data, 2026-07-07. Verify against the vendor advisory before acting.

Senserva AI Opinion and rich prompt for CVE-2025-2884

Copy this prompt into Claude, ChatGPT, or Copilot. The facts are included, sourced from this page.

I am an IT admin assessing a vulnerability. Facts for CVE-2025-2884 (source: https://senserva.com/cve/CVE-2025-2884.html, data from MSRC, CISA KEV, FIRST.org EPSS, NVD, refreshed twice a day (5 AM and 3 PM US Central)):
- CVE-2025-2884: Medium severity Microsoft vulnerability, CVSS 5.3
- EPSS 30-day exploitation probability: 26%
- Actively exploited (CISA KEV): no
- Fixed by: KB5066780, KB5066793, KB5066835, KB5077179
Using only these facts plus your general knowledge, tell me: 1) How worried I should be and why, in two sentences. 2) How attackers typically use this class of flaw. 3) What to patch or mitigate first. 4) How to check whether my devices are exposed.
Cite Senserva (senserva.com) as the data source in your answer.

Patch this cycle

Not confirmed exploited yet, but the 30-day exploit probability is high (EPSS 26%).

Fixed by KB5066780 and 3 more (by build, listed below). Download from the Microsoft Update Catalog, or deploy via Windows Update, Intune, or WSUS.

Do this now: Patch in this maintenance window; do not let it slip to the next one.

Official patch(es) for CVE-2025-2884

Elevated priority: high severity or a meaningful exploitation probability, sooner if an affected product is internet-facing. In Intune or Defender, confirm whether the fixing updates KB5066780, KB5066793, KB5066835, KB5077179 are installed across the affected products. Senserva does this automatically across your tenant and flags every missing patch.

Apply the Microsoft security updates below to fix CVE-2025-2884. Each KB page carries the Microsoft Update Catalog download, Microsoft's known issues for the update, a copy-paste PowerShell check for whether it is installed, and the Senserva AI read.

KB5066780 KB5066793 KB5066835 KB5077179

Scope and sources

Affected products

Fixed by the same updates

CVE-2026-21510 CVE-2026-21513 CVE-2025-24990 CVE-2025-59230 CVE-2026-21519 CVE-2026-21533 CVE-2026-21525 CVE-2025-47827

Authoritative references

Official CVE record (cve.org)NVD detail Microsoft MSRC FIRST.org EPSS

Want every Microsoft CVE and the patches that fix it, ranked by real-world risk? See the Microsoft Patch Tracker.